nfs: Remove dead case from nfs4_map_errors()

NFS4ERR_ACCESS has number 13 and thus is matched and returned
immediately at the beginning of nfs4_map_errors() and there's no point
in checking it later.

Coverity-id: 733891
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/nfs4proc.c

@@ -158,8 +158,6 @@ static int nfs4_map_errors(int err)
 		return -EACCES;
 	case -NFS4ERR_MINOR_VERS_MISMATCH:
 		return -EPROTONOSUPPORT;
-	case -NFS4ERR_ACCESS:
-		return -EACCES;
 	case -NFS4ERR_FILE_OPEN:
 		return -EBUSY;
 	default: